Answer:
Part A: C. Constancia doesn’t realize the effect that her actions have on others
Part B: C. ”I don’t understand why she’s so upset"
Explanation:
This is the excerpt from Judith Ortiz Cofer's short story "Abuela Invents the Zero".
Although no specific dialogue is cited in the question, I'm assuming it refers to the dialogue between Constancia and her mother at the end of the story.
Constancia's grandmother comes to a visit and, being a Catholic, she wants to attend the Sunday mass. It is decided that Constancia will escort her to the church since her mothet is sick and her father stays to take care of her.
Constancia accepts reluctantly but the situation only gets worse when she feels embarrassed by her grandmother's appearance and behaviour at the church.
When Abuela gets lost in the church, Constancia doesn't help her at all, not wanting people to see them together.
This selfish act hurt Abuela so she doesn't speak to Constancia on their way home nor she accepts her help with walking.
This only shows that Constancia only cared about how her grandma embarrassed her and what her friend would say of this; she didn't care about her Abuela's feelings or helping her.
This can also best be seen from her excuses when mother confronts her and she still seems unaware of the fact she hurt her grandmother's feelings.